python学习笔记1：序列字符串列表操作 <p><span style="font-size: 16px;">哈哈，开始学习python，学门新技术。欧耶。</span></p><p><span style="font-size: 16px;">还有，下午吃海底捞。还有。记得锻炼身体保持健康。</span></p><p><br/></p><p><span style="font-size: 16px;">一、字符串切片的原理</span></p><pre class="brush:python;toolbar:false">s='abcde' for i in range(5,0,-1): print s[0:i] print 'dbc' in 'abcd'</pre><p><br/></p><p><span style="font-size: 16px;">二、字符串模版</span></p><pre class="brush:python;toolbar:false">from string import Template s = Template("Hello , my dear ${username}") print s.substitute(username = 'yzh') s="today is a great day" print s.upper()</pre><p><span style="font-size: 16px;">三、三引号</span></p><pre class="brush:html;toolbar:false">errHTML = ''' <HTML><HEAD><TITLE> Friends CGI Demo</TITLE></HEAD> <BODY><H3>ERROR</H3> <B>%s</B><P> <FORM><INPUT TYPE=button VALUE=Back ONCLICK="window.history.back()"></FORM> Edit By Vheavens Edit By Vheavens </BODY></HTML> ''' print errHTML</pre><p><br/></p><p><span style="font-size: 16px;">四、unicode和编码解码</span></p><pre class="brush:python;toolbar:false">s= u"hehe" utf8S = s.encode("utf-8") normalS = utf8S.decode("utf-8") print normalS</pre><p><br/></p><p><span style="font-size: 16px;">五、哈希加密</span></p><pre class="brush:python;toolbar:false">import hashlib s="yzh" sa = hashlib.md5() sa.update(s) print sa.hexdigest() sa.update("yzh1") print sa.hexdigest()</pre><p><br/></p><p><span style="font-size: 16px;">六、简易正则</span></p><pre class="brush:python;toolbar:false">import re errHTML =''' username:yzh userqq:123 username:lsl userqq:456 ''' p = re.compile("username:(.*)\suserqq:(?P\d*)",re.IGNORECASE) m = p.finditer(errHTML) if m: for i in m: print i.group("qq")</pre><p><br/></p> 来自 大脸猫 写于 2015-01-05 13:29 -- 更新于2020-10-19 13:06 -- 0 条评论